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Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
45°F
7°C
| Humidity | 74% |
| Wind Speed | S 14 mph |
| Barometer | 29.89 in (1012.3 mb) |
| Dewpoint | 37°F (3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 39°F (4°C) |
| Last update | 8 Jan 1:54 am CST |
Extended Forecast for
Decatur Airport IL
Overnight

Low: 41 °F
Mostly Cloudy
Thursday
High: 63 °F
Chance Rain
and Patchy
Fog then Rain
and BreezyThursday Night
Low: 47 °F
Breezy. Heavy
Rain then
Chance RainFriday
High: 50 °F
Mostly Cloudy
and Breezy
then Mostly
CloudyFriday Night
Low: 35 °F
Mostly Cloudy
then Chance
RainSaturday
High: 42 °F
Chance Rain
then Partly
Sunny and
BreezySaturday Night
Low: 21 °F
Partly Cloudy
then Mostly
Cloudy and
BlusterySunday
High: 31 °F
Partly Sunny
and Blustery
then Mostly
SunnySunday Night

Low: 22 °F
Mostly Clear
Detailed Forecast
Overnight
Mostly cloudy, with a low around 41. South southeast wind 10 to 13 mph, with gusts as high as 21 mph.
Thursday
Rain, mainly after 11am. Patchy fog between 8am and 11am. High near 63. Breezy, with a south southeast wind 13 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain and thunderstorms before 3am, then a slight chance of rain. Some of the storms could produce heavy rainfall. Low around 47. Breezy, with a south wind 20 to 25 mph becoming west southwest after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Friday
Mostly cloudy, with a high near 50. Breezy, with a west wind 15 to 20 mph becoming north 8 to 13 mph in the afternoon. Winds could gust as high as 29 mph.
Friday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 35. Northeast wind around 7 mph.
Saturday
A 40 percent chance of rain before noon. Partly sunny, with a high near 42. Breezy, with a west wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Saturday Night
Mostly cloudy, with a low around 21. Blustery, with a west wind 16 to 21 mph, with gusts as high as 28 mph.
Sunday
Partly sunny, with a high near 31. Blustery.
Sunday Night
Mostly clear, with a low around 22.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 31.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
Mostly cloudy, with a high near 38.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Decatur Airport IL
39.84°N 88.88°W (Elev. 650 ft)
39.84°N 88.88°W (Elev. 650 ft)
1:51 am CST Jan 8, 2026
2am CST Jan 8, 2026-6pm CST Jan 14, 2026


